Alhajeri Bader H, Hasan Zahraa, Alhaddad Hasan
Department of Biological Sciences, Kuwait University, Safat, 13060, Kuwait.
Curr Zool. 2022 Aug 1;69(4):475-490. doi: 10.1093/cz/zoac057. eCollection 2023 Aug.
Recent phylogenetic studies amended the taxonomy of three-toed jerboas (subfamily Dipodinae), including raising subspecies to full species. Here, we use geometric morphometrics to compare scaled-shape differences in dipodine crania while considering their revised taxonomy. We sampled , , , , , , , , , and . Crania were not sexually dimorphic. Common allometry explained some of the shape variation, for example, reduced braincases in larger specimens. Most operational taxonomic unit pairs differed in both size and shape. and clustered together based on their cranial shape. differed from the aforementioned genera by its larger tympanic bulla, broader braincase, larger infraorbital foramen, along with reduced molars and rostra. differed from other by its broader face versus reduced cranial vault. (subgenus ) resembles members of the subgenus more than its consubgener (). , previously considered a synonym of , clearly differed from the latter by its shorter rostrum, smaller infraorbital foramen, and more caudolaterally expanded tympanic bulla. , another recent synonym of , resembled more in scaled cranial shape than it did . and were indistinguishable, but they clearly differed from (recently raised to full species) with the latter having a larger molar row, more inflated tympanic bulla, and shorter, slenderer rostrum. Ecological explanations for detected cranial shape differences are considered, including diet and habitat (particularly substrate).
最近的系统发育研究修订了三趾跳鼠（跳鼠亚科）的分类法，包括将亚种提升为完整物种。在此，我们使用几何形态测量学来比较跳鼠亚科颅骨的缩放形状差异，同时考虑它们修订后的分类法。我们对[具体物种名称1]、[具体物种名称2]、[具体物种名称3]、[具体物种名称4]、[具体物种名称5]、[具体物种名称6]、[具体物种名称7]、[具体物种名称8]、[具体物种名称9]和[具体物种名称10]进行了采样。颅骨不存在两性异形。常见的异速生长解释了部分形状变化，例如，较大标本的脑壳缩小。大多数操作分类单元对在大小和形状上都存在差异。[具体物种名称1]和[具体物种名称2]基于其颅骨形状聚类在一起。[具体物种名称3]与上述属不同，其鼓泡更大、脑壳更宽、眶下孔更大，同时臼齿和吻部缩小。[具体物种名称4]与其他[相关属名称]不同，其面部更宽而颅顶缩小。[具体物种名称5]（[亚属名称1]亚属）与其同亚属（[亚属名称2]）的成员相比，更类似于[亚属名称3]亚属的成员。[具体物种名称6]，以前被认为是[具体物种名称7]的同义词，其吻部较短、眶下孔较小且鼓泡向尾外侧扩张更多，明显与后者不同。[具体物种名称8]，[具体物种名称7]的另一个近期同义词，在缩放后的颅骨形状上与[具体物种名称7]相比，更类似于[具体物种名称9]。[具体物种名称9]和[具体物种名称10]无法区分，但它们明显与[具体物种名称11]（最近提升为完整物种）不同，后者的臼齿列更大、鼓泡更膨大且吻部更短、更细长。我们考虑了对检测到的颅骨形状差异的生态学解释，包括饮食和栖息地（特别是基质）。
